Power Manager. UCC1919 Datasheet

UCC1919 Manager. Datasheet pdf. Equivalent

Part UCC1919
Description 3V to 8V Hot Swap Power Manager
Feature 3V to 8V Hot Swap Power Manager application INFO available UCC1919 UCC2919 UCC3919 FEATURES • Pre.
Manufacture Unitrode
Datasheet
Download UCC1919 Datasheet

3V to 8V Hot Swap Power Manager application INFO available UCC1919 Datasheet
Recommendation Recommendation Datasheet UCC1919 Datasheet





UCC1919
3V to 8V Hot Swap Power Manager
application
INFO
available
UCC1919
UCC2919
UCC3919
FEATURES
Precision Fault Threshold
Charge Pump for Low RDSON High Side
Drive
Differential Sense Inputs
Programmable Average Power Limiting
Programmable Linear Current Control
Programmable Fault Time
Fault Output Indicator
Manual and Automatic Reset Modes
Shutdown Control w/Programmable
Softstart
Undervoltage Lockout
Electronic Circuit Breaker Function
DESCRIPTION
The UCC3919 family of Hot Swap Power Managers provide complete
power management, hot swap, and fault handling capability. The
UCC3919 features a duty ratio current limiting technique, which pro-
vides peak load capability while limiting the average power dissipa-
tion of the external pass transistor during fault conditions. The
UCC3919 has two reset modes, selected with the TTL/CMOS com-
patible L/R pin. In one mode, when a fault occurs the IC repeatedly
tries to reset itself at a user defined rate, with user defined maximum
output current and pass transistor power dissipation. In the other
mode the output latches off and stays off until either the L/R pin is re-
set or the shutdown pin is toggled. The on board charge pump circuit
provides the necessary gate voltage for an external N-channel power
FET.
BLOCK DIAGRAM
VDD 13
CSP 14
VDD
CSN 12
IMAX 1
+ 1.5v
IBIAS 2
UVBIAS
1X
PL 9
FLT
SD
CT 8
GND 11
50mV
OVERCURRENT
COMPARATOR
+
LINEAR
CURRENT
AMPLIFIER
+
200mV
VDD
1X
36µA
OVERLOAD
COMPARATOR
+
SET
DOMINANT
SQ
1.5V
+
0.5V
+
SQ
RQ
1.2µA
SD
5
LR
RQ
SQ
RQ
RESET
DOMINANT
Note: Pins shown for 14-pin package.
07/99
CHARGE
PUMP
VDD
UVLO
UVLO
DRIVER
UVBIAS
FLT
6
SD
4 CAP
10 GATE
7 FLT
UDG-98123



UCC1919
ABSOLUTE MAXIMUM RATINGS
VDD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 10V
Pin Voltage
(All pins except CAP and GATE). . . . . . –0.3V to VDD + 0.3V
Pin Voltage
(CAP and GATE) . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 15V
PL Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5mA to –10mA
IBIAS Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0mA to 3mA
Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C
Currents are positive into, negative out of the specified termi-
nal. Consult Packaging Section of Databook for thermal limita-
tions and considerations of package.
CONNECTION DIAGRAMS
DIL-14, (Top View)
N, J Packages
IMAX 1
IBIAS 2
N/C 3
CAP 4
L/R 5
SD 6
FLT 7
UCC1919
UCC2919
UCC3919
14 CSP
13 VDD
12 CSN
11 GND
10 GATE
9 PL
8 CT
SOIC-16, TSSOP-16 (Top View)
D or PW Package
IMAX 1
16 CSP
IBIAS 2
15 VDD
N/C 3
14 CSN
CAP 4
13 GND
L/R 5
12 GATE
SD 6
11 PL
N/C 7
10 N/C
FLT 8
9 CT
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VDD = 5V, TA = 0°C to 70°C for the UCC3919, –40°C
to 85°C for the UCC2919 and –55°C to 125°C for the UCC1919. All voltages are with respect to GND. TA = TJ.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
Input Supply
Supply Current
VDD = 3V
0.5 1 mA
VDD = 8V
1 1.5 mA
Shutdown Current
SD = 0.2V
1 7 µA
Undervoltage Lockout
Minimum Voltage to Start
2.35 2.75 3
V
Minimum Voltage after Start
1.9 2.25 2.5
V
Hysteresis
0.25 0.5 0.75 V
IBIAS
Output Voltage, (0 A < IOUT < 15 A)
25°C, referred to CSP
1.47 1.5 1.53 V
Over Temperature Range, referred to CSP
1.44 1.5 1.56 V
Maximum Output Current
12
mA
2





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